code: def _test_foo():
      return 1, 2
  
imports: from hyperopt.pyll import base
  from hyperopt.pyll.base import Literal, as_apply, Apply, dfs, scope, rec_eval, p0, Lambda, clone_merge
  from nose import SkipTest
  from nose.tools import assert_raises
  import numpy
label_desc: Use image node_id 13 for calling a global function with example usage: _test_foo() and returns: int,  int